Härmä's paper is certainly not for everybody but it's very useful for those who want to design/implement filters with frequency responses matching certain masking threshold curves. The problem of delay free loops arise when trying to exploit the nonuniform bandwidth of the critical bands during filter design by the use of the frequency warping technique. Härmä's paper provides a general solution to the "delay free loops"-problem as well as special modified structures for frequency warped all-pole filters (including the lattice structure).

The title alone sounds as if it covers all the bases that I want. I mean I'm wrapping up a C++ course, and I want a bit of motivation to peek ahead and see how I can apply all this to sounds, in general. That includes signal processing, but I feel like it should include other elements (though, as a noob, I'm sorta oblivious to what all they could be).

I may be underestimating how broad of a field digital signal processing is, but can anyone recommend a decent introductory book to the world of programming and audio, in addition to the one I linked above?